Display device

Abstract

A display device includes: a substrate having thereon a first subpixel, a second subpixel, and a third subpixel; a first electrode in each of the first to third subpixels on the substrate; a first bank between the first electrodes; a second bank on the first bank and having a width less than that of the first bank; a light emitting layer on the first electrodes, the first bank, and the second bank; and a second electrode on the light emitting layer. The light emitting layer provided on the second bank and the light emitting layer provided on the first bank are spaced apart from each other.

The invention claimed is: 
     
       1. A display device, comprising:
 a substrate having thereon a first subpixel, a second subpixel, and a third subpixel; 
 first electrodes in each of the first to third subpixels on the substrate; 
 a first bank between the first electrodes, the first bank having a first width; 
 a second bank on the first bank, the second bank having a second width that is less than the first width; 
 a third bank provided on the second bank and covering a top and whole side surfaces of the second bank; 
 a light emitting layer on the first electrodes, the first bank, and the second bank; and 
 a second electrode on the light emitting layer, 
 wherein the light emitting layer provided on the second bank and the light emitting layer provided on the first bank are spaced apart from each other, 
 wherein the second bank includes a plurality of bank patterns that is provided between two neighboring subpixels, 
 wherein the second bank is located at a top surface of the first bank, 
 wherein the light emitting layer includes:
 a first light emitting layer in the first subpixel and configured to emit light of a first color; 
 a second light emitting layer in the second subpixel and configured to emit light of a second color; and 
 a third light emitting layer in the third subpixel and configured to emit light of a third color, 
 
 wherein each of the first light emitting layer, the second light emitting layer, and the third light emitting layer includes:
 a light emitting portion provided between the first electrode and the second electrode and including an emission area emitting light; 
 a first light non-emitting portion on the second bank that does not emit light; and 
 a second light non-emitting portion on the first bank on which the second bank is not formed that does not emit light, and 
 wherein the first light non-emitting portion and the second light non-emitting portion are separated from each other. 
 
 
     
     
       2. The display device according to  claim 1 , wherein an angle which is formed by a bottom surface of the second bank in contact with the top surface of the first bank and a side surface of the second bank is equal to or greater than 90 degrees. 
     
     
       3. The display device according to  claim 1 , wherein the second bank laterally surrounds each of the first to third subpixels. 
     
     
       4. The display device according to  claim 1 , wherein the second bank has a height which is greater than 3000 Å. 
     
     
       5. The display device according to  claim 1 , wherein the second bank includes a plurality of bank patterns, the plurality of bank patterns being separated from each other. 
     
     
       6. The display device according to  claim 1 , wherein the first bank is formed of an inorganic material. 
     
     
       7. The display device according to  claim 1 , wherein the second bank is formed of a metal material. 
     
     
       8. The display device according to  claim 1 , wherein the second bank is formed of an inorganic material. 
     
     
       9. The display device according to  claim 8 , wherein the third bank provided on the second bank and formed of a metal material. 
     
     
       10. The display device according to  claim 1 , wherein the light emitting portion and the first light non-emitting portion are separated from each other. 
     
     
       11. A display device, comprising:
 a substrate having thereon a plurality of pixels, the plurality of pixels including a first subpixel, a second subpixel, and a third subpixel; 
 a first electrode in each of the first to third subpixels on the substrate; 
 a first bank that between the first electrode; 
 a second bank on the first bank; 
 a light emitting layer on the first electrode, the first bank, and the second bank; and 
 a second electrode on the light emitting layer, 
 wherein the first subpixel, the second subpixel, and the third subpixel each have different shapes, 
 wherein the light emitting layer includes:
 a first light emitting layer in the first subpixel, a second light emitting layer in the second subpixel and a third light emitting layer in the third subpixel, each of the first to third light emitting layers including:
 a light emitting portion provided between the first electrode and the second electrode and including an emission area emitting light; 
 a first light non-emitting portion on the second bank, the first light non-emitting portion not being configured to emit light; and 
 a second light non-emitting portion on the first bank on which the second bank is not formed, the second light non-emitting portion not being configured to emit light, 
 wherein the first light non-emitting portion and the second light non-emitting portion are separated from each other, and 
 wherein the first light non-emitting portions of two neighboring subpixels stacked each other on the second bank. 
 
 
 
     
     
       12. The display device according to  claim 11 , wherein the second bank has a width which is less than that of the first bank. 
     
     
       13. The display device according to  claim 11 , wherein an angle which is formed by a bottom surface of the second bank in contact with a top surface of the first bank and a side surface of the second bank is equal to or greater than 90 degrees. 
     
     
       14. The display device according to  claim 11 , wherein the second bank surrounds each of the first to third subpixels. 
     
     
       15. The display device according to  claim 11 , wherein the second subpixel has a shape that surrounds the first subpixel and the third subpixel has a shape that surrounds the second subpixel. 
     
     
       16. The display device according to  claim 11 , wherein the plurality of pixels include a first pixel, a second pixel that is adjacent to the first pixel in a first direction, and a third pixel that is adjacent to the second pixel in the first direction, and
 wherein the first subpixel, the second subpixel, and the third subpixel which are included in each of the first pixel, the second pixel, and the third pixel have different shapes. 
 
     
     
       17. The display device according to  claim 16 , wherein the first pixel has a shape in which the second subpixel laterally surrounds the first subpixel and the third subpixel laterally surrounds the second subpixel,
 wherein the second pixel has a shape in which the third subpixel laterally surrounds the second subpixel and the first subpixel laterally surrounds the third subpixel, and 
 wherein the third pixel has a shape in which the first subpixel laterally surrounds the third subpixel and the second subpixel laterally surrounds the first subpixel. 
 
     
     
       18. The display device according to  claim 16 , wherein a total area of the first subpixels included in the first pixel, the second pixel, and the third pixel, a total area of the second subpixels included in the first pixel, the second pixel, and the third pixel, and a total area of the third subpixels included in the first pixel, the second pixel, and the third pixel are the same.